const Readable = require('stream').Readable
const rs = Readable()
const s = 'VaJoy'
const l = s.length
let i = 0
rs._read = () => {
  if (i === l) {
    rs.push(' is my name')
    return rs.push(null)
  }
  rs.push(s[i++])
}
rs.pipe(process.stdout)
